Jefferis, B. G., & Nichols, J. L. (1920). Searchlights on health: The science of eugenics ; a guide to purity and physical manhood, advice to maiden, wife and mother, love, courtship, and marriage. J.L. Nichols.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Jefferis, B. G., و J. L. Nichols. Searchlights on Health: The Science of Eugenics ; a Guide to Purity and Physical Manhood, Advice to Maiden, Wife and Mother, Love, Courtship, and Marriage. Naperville, Ill.: J.L. Nichols, 1920.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Jefferis, B. G., و J. L. Nichols. Searchlights on Health: The Science of Eugenics ; a Guide to Purity and Physical Manhood, Advice to Maiden, Wife and Mother, Love, Courtship, and Marriage. J.L. Nichols, 1920.
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