APA Style

allen, W, S., Pujiastutik, H. (1986). english for art and science . Jakarta: UNESA UNIVERSITY Press Anggota IKAPI.

MLA Style

allen, W., Stannard., Pujiastutik, Hernik. "english for art and science". Jakarta: UNESA UNIVERSITY Press Anggota IKAPI, 1986. Buku PGSD.