Gaya APA

SYAM, R, M., RATNASARI, A, R. (2016). Understanding resident' activity system-improving quality life : . Surabaya: LPPM Univ Petra.

Gaya MLA

SYAM, Rachma, Marcillia., RATNASARI, Anisza, Ratnasari. "Understanding resident' activity system-improving quality life :". Surabaya: LPPM Univ Petra, 2016. Artikel.