APA (7th ed.) Citation

Bascombe, M. J., Johnston, G., & Bascombe, F. S. (1999). The butterflies of Hong Kong. Academic.

Chicago Style (17th ed.) Citation

Bascombe, M. J., Gweneth Johnston, and F. S. Bascombe. The Butterflies of Hong Kong. San Diego, Calif. ; London: Academic, 1999.

MLA (9th ed.) Citation

Bascombe, M. J., et al. The Butterflies of Hong Kong. Academic, 1999.