Dolet Unaradjan, 1954-; Herfan, Johannes Jony. (2000). Pengantar metode penelitian ilmu sosial / Dalet Unaradjan ; editor, Johannes Djony Herfan. Jakarta :: Grasindo,.
Dolet Unaradjan, 1954-; Herfan, Johannes Jony. Pengantar metode penelitian ilmu sosial / Dalet Unaradjan ; editor, Johannes Djony Herfan. Jakarta :: Grasindo,, 2000
Dolet Unaradjan, 1954-; Herfan, Johannes Jony. Pengantar metode penelitian ilmu sosial / Dalet Unaradjan ; editor, Johannes Djony Herfan. Jakarta :: Grasindo,, 2000.