Gaya APA
Gall, Meredith D.. (2003).
educational Research : an introduction Seventh edition .
United State:
Pearson Education, Inc..
Gaya Chicago
Gall, Meredith D..
educational Research : an introduction Seventh edition.
United State:
Pearson Education, Inc.,
2003.
MP.
Gaya MLA
Gall, Meredith D..
educational Research : an introduction Seventh edition.
United State:
Pearson Education, Inc.,
2003.
MP.
Gaya Turabian
Gall, Meredith D..
educational Research : an introduction Seventh edition.
United State:
Pearson Education, Inc.,
2003.
MP.