Dyfyniad APA
Oberle, M. W., Sosa, D., Madrigal Pana, J., Becker, S., Morris, L., & Rosero-Bixby, L. Contraceptive use and fertility in Costa Rica, 1986.
Dyfyniad Arddull Chicago
Oberle, Mark W., Doris Sosa, Johnny Madrigal Pana, Stan Becker, Leo Morris, and Luis Rosero-Bixby. Contraceptive Use and Fertility in Costa Rica, 1986.
Dyfyniad MLA
Oberle, Mark W., et al. Contraceptive Use and Fertility in Costa Rica, 1986.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.