APA استشهاد

Freytag, A., & Thurik, R. (2010). Entrepreneurship and culture. Springer.

استشهاد بنمط شيكاغو

Freytag, Andreas, و Roy.,ed.by Thurik. Entrepreneurship and Culture. Berlin: Springer, 2010.

MLA استشهاد

Freytag, Andreas, و Roy.,ed.by Thurik. Entrepreneurship and Culture. Springer, 2010.