APA (7th ed.) Citation

Henty, E. E., & Pritchard, G. H. (1973). Weeds of New Guinea & their control. Dept. of Forests, Division of Botany.

Chicago Style (17th ed.) Citation

Henty, E. E., and G. H. Pritchard. Weeds of New Guinea & Their Control. Lae: Dept. of Forests, Division of Botany, 1973.

MLA (9th ed.) Citation

Henty, E. E., and G. H. Pritchard. Weeds of New Guinea & Their Control. Dept. of Forests, Division of Botany, 1973.