APA (7th ed.) Citation

Halacy, D. S. (1971). Now or never: The fight against pollution. Four Winds Press.

Chicago Style (17th ed.) Citation

Halacy, D. S. Now or Never: The Fight Against Pollution. New York: Four Winds Press, 1971.

MLA (9th ed.) Citation

Halacy, D. S. Now or Never: The Fight Against Pollution. Four Winds Press, 1971.

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