Penggayaan APA
Boak, George. (1998).
Learning Contracts .
Hamspire , England:
Gower.
Chicago Style
Boak, George.
Learning Contracts.
Hamspire , England:
Gower,
1998.
Buku.
MLA Style
Boak, George.
Learning Contracts.
Hamspire , England:
Gower,
1998.
Buku.
Turabian Style
Boak, George.
Learning Contracts.
Hamspire , England:
Gower,
1998.
Buku.