Cita APA (7a ed.)

Poppe, G. T., & Goto, Y. (1993). European seashells. Christa Hemmen.

Cita Chicago Style (17a ed.)

Poppe, Guido T., y Yoshihiro Goto. European Seashells. Wiesbaden: Christa Hemmen, 1993.

Cita MLA (9a ed.)

Poppe, Guido T., y Yoshihiro Goto. European Seashells. Christa Hemmen, 1993.