APA Style
Leedy, Paul D.. (1989).
Practical Research E4 (4th ed).
New York:
MACMILLAN PUBLISHING.
Chicago Style
Leedy, Paul D..
Practical Research E4.
4th ed
New York:
MACMILLAN PUBLISHING,
1989.
Teks.
MLA Style
Leedy, Paul D..
Practical Research E4.
4th ed
New York:
MACMILLAN PUBLISHING,
1989.
Teks.
Turabian Style
Leedy, Paul D..
Practical Research E4.
4th ed
New York:
MACMILLAN PUBLISHING,
1989.
Teks.