Cita APA (7a ed.)

Williams, S. I., Piñeyro Piñeiro, P. E., & Sota, R. L. d. l. (2008). Accuracy of pregnancy diagnosis in swine by ultrasonography.

Cita Chicago Style (17a ed.)

Williams, Sara Inés, Pablo Enrique Piñeyro Piñeiro, y Rodolfo Luzbel de la Sota. Accuracy of Pregnancy Diagnosis in Swine by Ultrasonography. 2008.

Cita MLA (8a ed.)

Williams, Sara Inés, et al. Accuracy of Pregnancy Diagnosis in Swine by Ultrasonography. 2008.