Cita APA (7a ed.)

Verhagen, K. (1987). Self-help promotion: : a challenge to the NGO community. Royal Tropical Institute [etc.].

Cita Chicago Style (17a ed.)

Verhagen, Koenraad. Self-help Promotion: : A Challenge to the NGO Community. Amsterdam: Royal Tropical Institute [etc.], 1987.

Cita MLA (9a ed.)

Verhagen, Koenraad. Self-help Promotion: : A Challenge to the NGO Community. Royal Tropical Institute [etc.], 1987.