Cita APA

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

Chicago Edition Citation

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

Cita MLA

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