APA način citiranja

Ramirez, O., & 1994., S. P. P. P. i. D. C. T. (. R. 2. F. (1994). The plant protection policy situation in Central America.

Čikaški stil citiranja

Ramirez, O., i Seminar/Workshop Plant Protection Policies in Developing Countries Turrialba (Costa Rica) 21 Feb 1994. The Plant Protection Policy Situation in Central America. 1994.

MLA način citiranja

Ramirez, O., i Seminar/Workshop Plant Protection Policies in Developing Countries Turrialba (Costa Rica) 21 Feb 1994. The Plant Protection Policy Situation in Central America. 1994.