Cita APA

Walker, C. W., & Pye, B. G. (1960). The Length of the Human Umbilical Cord.

Citación estilo Chicago

Walker, C. W., y B. Gillian Pye. The Length of the Human Umbilical Cord. 1960.

Cita MLA

Walker, C. W., y B. Gillian Pye. The Length of the Human Umbilical Cord. 1960.