APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Packard, William V. Voyage Estimating. 2nd ed. London: Fairplay, 1981.

MLA (9th ed.) Citation

Packard, William V. Voyage Estimating. 2nd ed. Fairplay, 1981.