APA (7th ed.) Citation

Holt, K., Geschka, H., & Peterlongo, G. (1984). Need assessment : a key to user-oriented product innovation / Knut Holt, Horst Geschka, Giovanni Peterlongo: A key to user-oriented product innovation. Wiley.

Chicago Style (17th ed.) Citation

Holt, Knut, Horst Geschka, and Giovanni Peterlongo. Need Assessment : A Key to User-oriented Product Innovation / Knut Holt, Horst Geschka, Giovanni Peterlongo: A Key to User-oriented Product Innovation. Chichester: Wiley, 1984.

MLA (9th ed.) Citation

Holt, Knut, et al. Need Assessment : A Key to User-oriented Product Innovation / Knut Holt, Horst Geschka, Giovanni Peterlongo: A Key to User-oriented Product Innovation. Wiley, 1984.

Warning: These citations may not always be 100% accurate.