Παραπομπή σε μορφή APA (7η εκδ.)

Langen, N. (2013). Ethics in Consumer Choice: An Empirical Analysis based on the Example of Coffee. Springer Fachmedien Wiesbaden : Imprint: Springer Gabler.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Langen, Nina. Ethics in Consumer Choice: An Empirical Analysis Based on the Example of Coffee. Wiesbaden: Springer Fachmedien Wiesbaden : Imprint: Springer Gabler, 2013.

Παραπομπή σε μορφή MLA (8th εκδ.)

Langen, Nina. Ethics in Consumer Choice: An Empirical Analysis Based on the Example of Coffee. Springer Fachmedien Wiesbaden : Imprint: Springer Gabler, 2013.