APA (7th ed.) Citation

Roger, P. A., Voggesberger, M., & Margraf, J. (1986). Nitrogen-fixing phototrophs in the Ifugao rice terraces (Philippines).

Chicago Style (17th ed.) Citation

Roger, Pierre A., Monica Voggesberger, and Josef Margraf. Nitrogen-fixing Phototrophs in the Ifugao Rice Terraces (Philippines). 1986.

MLA (9th ed.) Citation

Roger, Pierre A., et al. Nitrogen-fixing Phototrophs in the Ifugao Rice Terraces (Philippines). 1986.