Gaya APA
Gall, Meredith D., Gall, Joyce P., Borg, Walter R.. (2007).
Educational research an introduction .
United States:
Allyn &Bacon.
Gaya Chicago
Gall, Meredith D., Gall, Joyce P., Borg, Walter R..
Educational research an introduction.
United States:
Allyn &Bacon,
2007.
Text.
Gaya MLA
Gall, Meredith D., Gall, Joyce P., Borg, Walter R..
Educational research an introduction.
United States:
Allyn &Bacon,
2007.
Text.
Gaya Turabian
Gall, Meredith D., Gall, Joyce P., Borg, Walter R..
Educational research an introduction.
United States:
Allyn &Bacon,
2007.
Print.