APA (7e ed.) Bronvermelding

Sien, C. L., Onyirimba, L., & Akpan, G. (1999). Liberalization of maritime transport services: Directions and options for ASIA. Ocean Law and Policy Series.

Chicago (17e ed.) Bronvermelding

Sien, Chia Lin, Lloyd Onyirimba, en George Akpan. "Liberalization of Maritime Transport Services: Directions and Options for ASIA." Ocean Law and Policy Series 1999.

MLA (9e ed.) Bronvermelding

Sien, Chia Lin, et al. "Liberalization of Maritime Transport Services: Directions and Options for ASIA." Ocean Law and Policy Series, 1999.