Style de citation APA (7e éd.)

Häkli, E. (1980). A. E. Nordenskiöld: A scientist and his library. Helsinki University Library.

Style de citation Chicago (17e éd.)

Häkli, Esko. A. E. Nordenskiöld: A Scientist and His Library. Helsinki: Helsinki University Library, 1980.

Style de citation MLA (9e éd.)

Häkli, Esko. A. E. Nordenskiöld: A Scientist and His Library. Helsinki University Library, 1980.