APA (7th ed.) Citation

Pollock, P. W. (1947). National parks. [Paul W. Pollock].

Chicago Style (17th ed.) Citation

Pollock, Paul W. National Parks. Phoenix, Ariz.: [Paul W. Pollock], 1947.

MLA (9th ed.) Citation

Pollock, Paul W. National Parks. [Paul W. Pollock], 1947.