Παραπομπή APA

Hulst, H. v. d. e. (1961). Space research II: Proceedings of the second international space science symposium, Florence, April 10-14, 1961. North-Holland.

Παραπομπή Chicago Style

Hulst, H.C. van de ed. Space Research II: Proceedings of the Second International Space Science Symposium, Florence, April 10-14, 1961. Amsterdam: North-Holland, 1961.

Παραπομπή MLA

Hulst, H.C. van de ed. Space Research II: Proceedings of the Second International Space Science Symposium, Florence, April 10-14, 1961. North-Holland, 1961.