APA (7th ed.) Citation

Schubel, R. J. (1980). The human impact on a montane oak forest in Costa Rica. [publisher not identified].

Chicago Style (17th ed.) Citation

Schubel, Richard John. The Human Impact on a Montane Oak Forest in Costa Rica. [Place of publication not identified]: [publisher not identified], 1980.

MLA (9th ed.) Citation

Schubel, Richard John. The Human Impact on a Montane Oak Forest in Costa Rica. [publisher not identified], 1980.