Ardales, V. B. (1992). Basic concepts and methods in research. Great Books Trading.
Chicago (17e ed.) BronvermeldingArdales, Venancio B. Basic Concepts and Methods in Research. Quezon City: Great Books Trading, 1992.
MLA (9e ed.) BronvermeldingArdales, Venancio B. Basic Concepts and Methods in Research. Great Books Trading, 1992.
Let op: Deze citaties zijn niet altijd 100% accuraat.