Παραπομπή σε μορφή APA (7η εκδ.)

Pirner, H. J. (2015). The Unknown as an Engine for Science: An Essay on the Definite and the Indefinite. Springer International Publishing : Imprint: Springer.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Pirner, Hans J. The Unknown as an Engine for Science: An Essay on the Definite and the Indefinite. Cham: Springer International Publishing : Imprint: Springer, 2015.

Παραπομπή σε μορφή MLA (8th εκδ.)

Pirner, Hans J. The Unknown as an Engine for Science: An Essay on the Definite and the Indefinite. Springer International Publishing : Imprint: Springer, 2015.