Gaya APA
Principles and practice in second language acquisition. (1981).
New York:
Prentice-Hall International Inc..
Gaya Chicago
Principles and practice in second language acquisition.
.
New York:
Prentice-Hall International Inc.,
1981.
Buku.
Gaya MLA
Principles and practice in second language acquisition.
.
New York:
Prentice-Hall International Inc.,
1981.
Buku.
Gaya Turabian
Principles and practice in second language acquisition.
New York:
Prentice-Hall International Inc.,
1981.
Buku.