Cooper, G. M., Roberta Pratt, F., & Jarman Hagood, M. (1941). Four Years of Contraception as a Public Health Service in North Carolina.
استشهاد بنمط شيكاغوCooper, George M., Frances Roberta Pratt, و Margaret Jarman Hagood. Four Years of Contraception As a Public Health Service in North Carolina. 1941.
MLA استشهادCooper, George M., Frances Roberta Pratt, و Margaret Jarman Hagood. Four Years of Contraception As a Public Health Service in North Carolina. 1941.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.