APA (7th ed.) Citation

Heyl, P. R. (1933). The philosophy of a scientific man. The Vanguard press.

Chicago Style (17th ed.) Citation

Heyl, Paul R. The Philosophy of a Scientific Man. New York: The Vanguard press, 1933.

MLA (9th ed.) Citation

Heyl, Paul R. The Philosophy of a Scientific Man. The Vanguard press, 1933.