Gaya APA

Wallace, Robert B et al.. (2008). Public health and preventive medicine 15th ed. . New York: McGraw Hill.

Gaya Chicago

Wallace, Robert B et al.. Public health and preventive medicine 15th ed.. New York: McGraw Hill, 2008. Text.

Gaya MLA

Wallace, Robert B et al.. Public health and preventive medicine 15th ed.. New York: McGraw Hill, 2008. Text.

Gaya Turabian

Wallace, Robert B et al.. Public health and preventive medicine 15th ed.. New York: McGraw Hill, 2008. Print.