APA (7th ed.) Citation

Internationl Seminar for Hydrology professors Indiana. US, UNESCO, & Purdue University. (1971). Biological effects in the hidrological cycle. Purdue University.

Chicago Style (17th ed.) Citation

Internationl Seminar for Hydrology professors Indiana. US, UNESCO, and Purdue University. Biological Effects in the Hidrological Cycle. Indiana: Purdue University, 1971.

MLA (9th ed.) Citation

Internationl Seminar for Hydrology professors Indiana. US, et al. Biological Effects in the Hidrological Cycle. Purdue University, 1971.