Gaya APA

Rinehart, M, R. (2021). Tangga Spiral : The Circular Staircase (Cet. 1). Yogyakarta: Laksana,.

Gaya MLA

Rinehart, Mary, Roberts. "Tangga Spiral : The Circular Staircase". Cet. 1 Yogyakarta: Laksana,, 2021. Text.