MLA
Ludlow, J. L. (John Livingston), 1819-1888. A manual of examinations upon anatomy and physiology, surgery, practice of medicine, chemistry, materia medica, obstetrics, etc : designed for the use of students of medicine throughout the United States. 1844. Medical Heritage Imprints Collection . Robert W. Woodruff Health Sciences Center. Library. https://digital.library.emory.edu/purl/2150gb5qxs-cor.
APA, 6th edition
Ludlow, J. L. (John Livingston), 1819-1888. (1844)[A manual of examinations upon anatomy and physiology, surgery, practice of medicine, chemistry, materia medica, obstetrics, etc : designed for the use of students of medicine throughout the United States]. Medical Heritage Imprints Collection , Robert W. Woodruff Health Sciences Center. Library. https://digital.library.emory.edu/purl/2150gb5qxs-cor.
Chicago
Ludlow, J. L. (John Livingston), 1819-1888, A manual of examinations upon anatomy and physiology, surgery, practice of medicine, chemistry, materia medica, obstetrics, etc : designed for the use of students of medicine throughout the United States, 1844, Medical Heritage Imprints Collection , Robert W. Woodruff Health Sciences Center. Library. https://digital.library.emory.edu/purl/2150gb5qxs-cor.