APA (7e ed.) Bronvermelding

Peccei, A., Ikeda, D., & Gage, R. L. (1984). Before it is too late. Kodansha International.

Chicago (17e ed.) Bronvermelding

Peccei, Aurelio, Daisaku Ikeda, en Richard L. Gage. Before It Is Too Late. Tokyo: Kodansha International, 1984.

MLA (9e ed.) Bronvermelding

Peccei, Aurelio, et al. Before It Is Too Late. Kodansha International, 1984.