APA Citation

Ferdinanda, & Dwinoor F.B. (2017). Let's learn English 1. Jakarta: Grasindo.

Chicago Style Citation

Ferdinanda, and Dwinoor F.B. Let's Learn English 1. Jakarta: Grasindo, 2017.

MLA Citation

Ferdinanda, and Dwinoor F.B. Let's Learn English 1. Jakarta: Grasindo, 2017.

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