APA
Oficina Sanitaria Panamericana, .Snail hosts of schistosomiasis and other snail-transmitted diseases in tropica. Washington: .
Chicago
Oficina Sanitaria Panamericana, .Snail hosts of schistosomiasis and other snail-transmitted diseases in tropica. Washington: .
Harvard
Oficina Sanitaria Panamericana, .Snail hosts of schistosomiasis and other snail-transmitted diseases in tropica. Washington: .
MLA
Oficina Sanitaria Panamericana, .Washington: . .