APA
Gerras C., . (1976). The encylopedia of common diseases. Emmaus: Rodale Press.
Chicago
Gerras Charles, . 1976. The encylopedia of common diseases. Emmaus: Rodale Press.
Harvard
Gerras C., . (1976). The encylopedia of common diseases. Emmaus: Rodale Press.
MLA
Gerras Charles, . The encylopedia of common diseases. Emmaus: Rodale Press. 1976.