APA Citation

(2018). Let's speak up! (Cetakan I, November 2018.). Yogyakarta: Samudra Biru.

Chicago Style Citation

Let's Speak Up! Cetakan I, November 2018. Yogyakarta: Samudra Biru, 2018.

MLA Citation

Let's Speak Up! Cetakan I, November 2018. Yogyakarta: Samudra Biru, 2018.

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