APA (7th ed.) Citation

Dollenbacher, M., & Schnake, R. H. (1989). Hamburg Tugs. World Ship Society.

Chicago Style (17th ed.) Citation

Dollenbacher, Michael, and Reinhard H. Schnake. Hamburg Tugs. Kendal: World Ship Society, 1989.

MLA (9th ed.) Citation

Dollenbacher, Michael, and Reinhard H. Schnake. Hamburg Tugs. World Ship Society, 1989.