Cita APA (7th ed.)
Bosma, P. B. (1973). The state of ionization in nova shells.
Cita Chicago (17th ed.)
Bosma, Pieter Bouke. The State of Ionization in Nova Shells. Groningen, 1973.
Cita MLA (9th ed.)
Bosma, Pieter Bouke. The State of Ionization in Nova Shells. 1973.
Atenció: Aquestes cites poden no estar 100% correctes.