APA (7th ed.) Citation

Rees, A. R., & Borg, H. H. v. d. (1975). Flower bulbs. ISHS.

Chicago Style (17th ed.) Citation

Rees, A. R., and H. H. van der Borg. Flower Bulbs. La Haya: ISHS, 1975.

MLA (9th ed.) Citation

Rees, A. R., and H. H. van der Borg. Flower Bulbs. ISHS, 1975.