Cita APA (7th ed.)
Hagerup, O. On the Origin of some Angiosperms through the Gnetales and the Coniferae.
Cita Chicago (17th ed.)
Hagerup, Olaf. On the Origin of Some Angiosperms Through the Gnetales and the Coniferae.
Cita MLA (9th ed.)
Hagerup, Olaf. On the Origin of Some Angiosperms Through the Gnetales and the Coniferae.
Atenció: Aquestes cites poden no estar 100% correctes.