APA (7th ed.) Citation

Plum, N. M. e. a. (1976). Freistaat Christiania. Packpapier.

Chicago Style (17th ed.) Citation

Plum, Niels Munk et al. Freistaat Christiania. Packpapier, 1976.

MLA (8th ed.) Citation

Plum, Niels Munk et al. Freistaat Christiania. Packpapier, 1976.

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