APA (7th ed.) Citation

Pendell, E. (1977). Why civilizations self-destruct. H. Allen.

Chicago Style (17th ed.) Citation

Pendell, Elmer. Why Civilizations Self-destruct. Cape Canaveral, FL: H. Allen, 1977.

MLA (9th ed.) Citation

Pendell, Elmer. Why Civilizations Self-destruct. H. Allen, 1977.

Warning: These citations may not always be 100% accurate.