APA (7e ed.) Bronvermelding

Não informado. (1979). Communications Engineering International. ESP Communications.

Chicago (17e ed.) Bronvermelding

Não informado. Communications Engineering International. Surrey, Inglaterra: ESP Communications, 1979.

MLA (8e ed.) Bronvermelding

Não informado. Communications Engineering International. ESP Communications, 1979.

Let op: Deze citaties zijn niet altijd 100% accuraat.