APA (7th ed.) Citation

Packard, W. V. (1981). Voyage estimating (2a. ed.). Fairplay Publications.

Chicago Style (17th ed.) Citation

Packard, William V. Voyage Estimating. 2a. ed. Londres: Fairplay Publications, 1981.

MLA (9th ed.) Citation

Packard, William V. Voyage Estimating. 2a. ed. Fairplay Publications, 1981.