De la Cruz, G. (1972). A follow-up study of the 1950-1965 graduates of the then Agusan Agricultural High School (Northern Mindanao National Agricultural College). s.n.].
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDe la Cruz, Gracia. A Follow-up Study of the 1950-1965 Graduates of the Then Agusan Agricultural High School (Northern Mindanao National Agricultural College). [Quezon City: s.n.], 1972.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDe la Cruz, Gracia. A Follow-up Study of the 1950-1965 Graduates of the Then Agusan Agricultural High School (Northern Mindanao National Agricultural College). s.n.], 1972.
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