Bell & Howell Co. Educational Division. (1931). Medical films and their sources: A compilation indicating 16 mm. films available on medical, surgical, health and hygiene subjects. Bell & Howell company, Educational division.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Bell & Howell Co. Educational Division. Medical Films and Their Sources: A Compilation Indicating 16 Mm. Films Available on Medical, Surgical, Health and Hygiene Subjects. Chicago: Bell & Howell company, Educational division, 1931.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Bell & Howell Co. Educational Division. Medical Films and Their Sources: A Compilation Indicating 16 Mm. Films Available on Medical, Surgical, Health and Hygiene Subjects. Bell & Howell company, Educational division, 1931.
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