Cita APA (7a ed.)

Bengtsson, C., Lindquist, O., & Redvall, L. (1979). Is the menopausal age rapidly changing? [s.n.].

Cita Chicago Style (17a ed.)

Bengtsson, Calle, Olof Lindquist, y Lasse Redvall. Is the Menopausal Age Rapidly Changing? [S.l.]: [s.n.], 1979.

Cita MLA (9a ed.)

Bengtsson, Calle, et al. Is the Menopausal Age Rapidly Changing? [s.n.], 1979.