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শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিMeeting/Symposium of the Environmental Education Network of the Philippines (EENP) University of the Philippines, Los Baños College, Laguna), এবং Environmental Education Network of the Philippines. Proceedings of the Fourth Meeting/Symposium of the Environmental Education Network of the Philippines (EENP). Laguna: University of the Philippines, 1990.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিMeeting/Symposium of the Environmental Education Network of the Philippines (EENP) University of the Philippines, Los Baños College, Laguna), এবং Environmental Education Network of the Philippines. Proceedings of the Fourth Meeting/Symposium of the Environmental Education Network of the Philippines (EENP). University of the Philippines, 1990.