Cita APA (7a ed.)

Flint, M. (1978). Is there a secular trend in age of menopause? [s.n.].

Cita Chicago Style (17a ed.)

Flint, Marcha. Is There a Secular Trend in Age of Menopause? [S.l.]: [s.n.], 1978.

Cita MLA (9a ed.)

Flint, Marcha. Is There a Secular Trend in Age of Menopause? [s.n.], 1978.