From Patricia Routley:
Another of John Jack's roses
Southern Cross
John Jack, Australia. 1977
deep yellow sport of Redgold

Note - This is a different rose to the pink ‘Southern Cross, bred by Alister Clark in 1931.

1997 Australian Rose Annual
p35. David Ruston. Australian Sports. Southern Cross. (Fl). Jack, 1977. – a deep yellow sport of the popular Redgold. Flowers well into the winter.

1999. Dianne Ackland “The Australian Rose Directory” 3rd Edition 1999
p94. Southern Cross (Sport of Redgold). Jack, Australia, 1977. Floribunda. Yellow. (Available from) Golden Vale.

1999 Botanica’s Roses. 2nd and revised edition Colourpix p558
p558. Southern Cross. Modern. Cluster-flowered floribunda. Deep yellow. Repeat Flowering. This rose is very similar to its award winning parent in most respects, with the exception of its flower color, which is daffodil yellow. The lightly fragranced blooms are well shaped and medium sized, with petals that reflex when the flower is fully open to show a dark mass of stamens at the center. ‘Southern Cross’ gives upright growth. Zones 5-10. Jack, Australia, 1977. Sport of ‘Redgold’.

1999. Peter Cox “Australian Roses” ` colourpix p29
p29. Southern Cross. 1977. Colour sport of Redgold (Dickson 1971) [ (Karl Herbst x Masquerade) x Faust] x Picadilly. Cluster Flowered bush rose sport. High centred bud. Semi-double, slightly fragrant, deep yellow flowers, opening flat, fully recurrent. Smooth, mid green foliage. Flower 18 petals, 70 mm 1 to 7. Bush. 1.25 m x 1 m.