APA (7th ed.) Citation

Läpple, A. (1967). Key problems of Genesis. Paulist Press.

Chicago Style (17th ed.) Citation

Läpple, Alfred. Key Problems of Genesis. Glen Rock, N.J.: Paulist Press, 1967.

MLA (9th ed.) Citation

Läpple, Alfred. Key Problems of Genesis. Paulist Press, 1967.