Cahill, K., & O`Brien, W. (1990). Tropical Medicine A Clinical Text.
Lua i Stíl Chicago (17ú heag.)Cahill, Kevin, agus William O`Brien. Tropical Medicine A Clinical Text. 1990.
Lua MLA (9ú heag.)Cahill, Kevin, agus William O`Brien. Tropical Medicine A Clinical Text. 1990.
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