APA (7th ed.) Citation

Keng, H., & Keng, R. L. (1990). The concise flora of Singapore: Gymnosperms and dicotyledons. Singapore University Press, National University of Singapore.

Chicago Style (17th ed.) Citation

Keng, Hsuan, and Ro-Siu Ling Keng. The Concise Flora of Singapore: Gymnosperms and Dicotyledons. Singapore: Singapore University Press, National University of Singapore, 1990.

MLA (8th ed.) Citation

Keng, Hsuan, and Ro-Siu Ling Keng. The Concise Flora of Singapore: Gymnosperms and Dicotyledons. Singapore University Press, National University of Singapore, 1990.

Warning: These citations may not always be 100% accurate.