Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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