APA Format
Gordis, Leon . (). Epidemiology : The natural history of disease : ways of expressing prognosis, ( Ket. lihat Bab. 6 ) ( halaman 109-130 ). : Philadelphia: Saunders Elsevier, 2009
MLA Format
Gordis, Leon . Epidemiology : The natural history of disease : ways of expressing prognosis, ( Ket. lihat Bab. 6 ) ( halaman 109-130 ). : Philadelphia: Saunders Elsevier, 2009,
Australian/Harvard Format
Gordis, Leon . . Epidemiology : The natural history of disease : ways of expressing prognosis, ( Ket. lihat Bab. 6 ) ( halaman 109-130 ). Philadelphia: Saunders Elsevier, 2009, 
Warning: These citations may not always be 100% accurate.