APA Citatie

Holt, K., Horst Geschka, & Giovanni Peterlongo. (1984). Need assessment. John Wiley.

Chicago Style citaat

Holt, Knut, Horst Geschka, en Giovanni Peterlongo. Need Assessment. Chichester: John Wiley, 1984.

MLA citatie

Holt, Knut, et al. Need Assessment. John Wiley, 1984.