Gaya APA

Evans, David. (2010). Powerbase : pre intermediate: study book (Cet. 7). Harlow, Essex: Pearseon Education Longman.

Gaya Chicago

Evans, David. Powerbase : pre intermediate: study book. Cet. 7 Harlow, Essex: Pearseon Education Longman, 2010. Buku.

Gaya MLA

Evans, David. Powerbase : pre intermediate: study book. Cet. 7 Harlow, Essex: Pearseon Education Longman, 2010. Buku.

Gaya Turabian

Evans, David. Powerbase : pre intermediate: study book. Cet. 7 Harlow, Essex: Pearseon Education Longman, 2010. Buku.