Cooper, D. R. Metode Penelitian Jilid 2. Erlangga.
Chicago Style (17th ed.) CitationCooper, Donald R. Metode Penelitian Jilid 2. Erlangga.
MLA (8th ed.) CitationCooper, Donald R. Metode Penelitian Jilid 2. Erlangga.
Warning: These citations may not always be 100% accurate.