Gaya APA

Rein, D, P. (1984). grolier intermediate english course 4 . the United States of America: [s.l].Grolier International. Inc.

Gaya MLA

Rein, David, P. "grolier intermediate english course 4". the United States of America: [s.l].Grolier International. Inc, 1984. Koleksi Elektronik.