APA Citation

Silvester Goridus Sukur, & Aprina Tri Retnaningrum. (2016). Toefl: Grammar guide book for beginners (Cet. 1.). Yogyakarta: Indonesia Cerdas.

Chicago Style Citation

Silvester Goridus Sukur, and Aprina Tri Retnaningrum. Toefl: Grammar Guide Book for Beginners. Cet. 1. Yogyakarta: Indonesia Cerdas, 2016.

MLA Citation

Silvester Goridus Sukur, and Aprina Tri Retnaningrum. Toefl: Grammar Guide Book for Beginners. Cet. 1. Yogyakarta: Indonesia Cerdas, 2016.

Warning: These citations may not always be 100% accurate.