MLA Style
Iskandar, Igo. Ayo Tertawa Biar Awet Muda. Surabaya: Gramatical, 2017. Online.
Chicago Style
Iskandar, Igo. Ayo Tertawa Biar Awet Muda. Surabaya: Gramatical, 2017.
Turabian Style
Iskandar, Igo, Ayo Tertawa Biar Awet Muda. Surabaya: Gramatical, 2017.
APA Style
Iskandar, Igo. (2017). Ayo Tertawa Biar Awet Muda. Surabaya: Gramatical.
Harvard Style
Iskandar, Igo, 2017, Ayo Tertawa Biar Awet Muda, Gramatical, Surabaya.
IEEE Style
Igo Iskandar, Ayo Tertawa Biar Awet Muda. Surabaya: Gramatical, 2017.