Gaya APA
Wallace, R, B.
(2008).
Maxcy-Rosenau-Last Public Health & Preventive Medicine
(
15)
.
USA:
McGrowHill medical.
Gaya MLA
Wallace, Robert, B..
"Maxcy-Rosenau-Last Public Health & Preventive Medicine".
15
USA:
McGrowHill medical,
2008.
Textbook.