APA (7th ed.) Citation

Pettis, L. W. (1965). Recent approaches to nature: Viewpoints of selected American non-fiction nature writers, 1945-1964. [publisher not identified].

Chicago Style (17th ed.) Citation

Pettis, Louis W. Recent Approaches to Nature: Viewpoints of Selected American Non-fiction Nature Writers, 1945-1964. [Nashville]: [publisher not identified], 1965.

MLA (8th ed.) Citation

Pettis, Louis W. Recent Approaches to Nature: Viewpoints of Selected American Non-fiction Nature Writers, 1945-1964. [publisher not identified], 1965.