Asian Pacific Congress of Gastroenterology, 4th, Manila, 1972. (1973). Congress programme and advance abstacts. Philippine Society of Gastroenterology.
Chicago-viite (17. p.)Asian Pacific Congress of Gastroenterology, 4th, Manila, 1972. Congress Programme and Advance Abstacts. Manila: Philippine Society of Gastroenterology, 1973.
MLA-viite (9. p.)Asian Pacific Congress of Gastroenterology, 4th, Manila, 1972. Congress Programme and Advance Abstacts. Philippine Society of Gastroenterology, 1973.
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