APA (7th ed.) Citation

Wallin, H. E. (1963). Interpretation: A manual and survey on establishing a naturalist program. American Institute of Park Executives.

Chicago Style (17th ed.) Citation

Wallin, Harold E. Interpretation: A Manual and Survey on Establishing a Naturalist Program. Wheeling, W. Va.: American Institute of Park Executives, 1963.

MLA (9th ed.) Citation

Wallin, Harold E. Interpretation: A Manual and Survey on Establishing a Naturalist Program. American Institute of Park Executives, 1963.