APA-Zitierstil (7. Ausg.)

Clifton, R. T. F. (1991). The Geraniaceae group: Pelargonium: key to the section Otidia. The Geraniaceae Group.

Chicago-Zitierstil (17. Ausg.)

Clifton, Richard Timothy Fred. The Geraniaceae Group: Pelargonium: Key to the Section Otidia. Dover [u.a.]: The Geraniaceae Group, 1991.

MLA-Zitierstil (9. Ausg.)

Clifton, Richard Timothy Fred. The Geraniaceae Group: Pelargonium: Key to the Section Otidia. The Geraniaceae Group, 1991.