APA (7th ed.) Citation

Clifford, H. T., & Ludlow, G. (1972). Keys to the families and genera of Queensland flowering plants (magnoliophyta). Queensland University Press.

Chicago Style (17th ed.) Citation

Clifford, H. T., and Gwen Ludlow. Keys to the Families and Genera of Queensland Flowering Plants (magnoliophyta). St. Lucia, Q.: Queensland University Press, 1972.

MLA (9th ed.) Citation

Clifford, H. T., and Gwen Ludlow. Keys to the Families and Genera of Queensland Flowering Plants (magnoliophyta). Queensland University Press, 1972.