Cita APA (7a ed.)
Stradner, H., & Perch-Nielsen, K. (1987). Proceedings: International Nannoplankton Association, Vienna Meeting = 1985. Geologische Bundesanstalt.
Cita Chicago Style (17a ed.)
Stradner, Herbert, y Katharina Perch-Nielsen. Proceedings: International Nannoplankton Association, Vienna Meeting = 1985. Wien: Geologische Bundesanstalt, 1987.
Cita MLA (9a ed.)
Stradner, Herbert, y Katharina Perch-Nielsen. Proceedings: International Nannoplankton Association, Vienna Meeting = 1985. Geologische Bundesanstalt, 1987.
Precaución: Estas citas no son 100% exactas.