Gaya APA

FENNER, P., Armstrong, M, C. (1981). RESEARCH A PRACTICAL GUIDE TO FINDING INFORMATION . united states of AMERICA: Wiliam Kaufmann,Inc.

Gaya MLA

FENNER, PETTER., Armstrong, Martcha, C.. "RESEARCH A PRACTICAL GUIDE TO FINDING INFORMATION". united states of AMERICA: Wiliam Kaufmann,Inc, 1981. Text.