Gaya APA

Schoenberg, Irene E.. (1994). Focus On Grammar . California: ADDISON WESLEY.

Gaya Chicago

Schoenberg, Irene E.. Focus On Grammar. California: ADDISON WESLEY, 1994. .

Gaya MLA

Schoenberg, Irene E.. Focus On Grammar. California: ADDISON WESLEY, 1994. .

Gaya Turabian

Schoenberg, Irene E.. Focus On Grammar. California: ADDISON WESLEY, 1994. .