Bergey, D. H. (1904). The principles of hygiene: A practical manual for students, physicians, and health officers (2nd ed., thoroughly rev. and enl.). W. B. Saunders.
Dyfyniad Arddull ChicagoBergey, D. H. The Principles of Hygiene: A Practical Manual for Students, Physicians, and Health Officers. 2nd ed., thoroughly rev. and enl. Philadelphia: W. B. Saunders, 1904.
Dyfyniad MLABergey, D. H. The Principles of Hygiene: A Practical Manual for Students, Physicians, and Health Officers. 2nd ed., thoroughly rev. and enl. W. B. Saunders, 1904.
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