Παραπομπή APA

Rickert, R. K. (1974). Astronomy and space exploration. Addison Wesley.

Παραπομπή Chicago Style

Rickert, Russell K. Astronomy and Space Exploration. London: Addison Wesley, 1974.

Παραπομπή MLA

Rickert, Russell K. Astronomy and Space Exploration. Addison Wesley, 1974.