APA aipamena

Randall, C. L., & Birtch, P. K. (1952). Spontaneous Abortion.

Chicago Style aipamena

Randall, Clyde L., and Paul K. Birtch. Spontaneous Abortion. 1952.

MLA aipamena

Randall, Clyde L., and Paul K. Birtch. Spontaneous Abortion. 1952.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.