APA (7e ed.) Bronvermelding

Gt. Brit Board of Trade & International code of signals. (1933). The 1931 international code of signals, vol. 2 (American ed.). United States Govt. Printing Office.

Chicago (17e ed.) Bronvermelding

Gt. Brit Board of Trade en International code of signals. The 1931 International Code of Signals, Vol. 2. American ed. Washington: United States Govt. Printing Office, 1933.

MLA (9e ed.) Bronvermelding

Gt. Brit Board of Trade en International code of signals. The 1931 International Code of Signals, Vol. 2. American ed. United States Govt. Printing Office, 1933.