Παραπομπή APA

Bjorn, L. O. Light and life. Hodder and Stoughton.

Παραπομπή Chicago Style

Bjorn, Lars Olof. Light and Life. London: Hodder and Stoughton.

Παραπομπή MLA

Bjorn, Lars Olof. Light and Life. Hodder and Stoughton.