Coba jelasin Karya dari Usman Pelly dong

Ara dan Perahu Bugisnya: Suatu Studi Pewarisan Keahlian Membuat Perahu Orang Bugis Kepada Anak dan Keturunan­nya, PLPIIS, Universitas Hasanuddin, 1975

Peranan Ulama di Tiga Kesultanan Melayu Pesisir Sumatra Timur, Leknas LIPI, 1976

Symbolic Aspect of Bugis Ship and Ship Building, Journal of the Steward Anthropological Society, 8(2), 1977

Ethnicity and Religious Movement in East Sumatra, thesis University of Illinois, USA, 1980

Differing Adaptation in Urban Migration”, makalah dalam The 81st Annual Meetings of the American Anthropological Association, Washington, D.C., 1982

Urban Migration and Adaptation in Indonesia: A Study of the Minangkabau and the Mandailing Batak Migrants in Medan, North Sumatra, disertasi University of Illinois, USA, 1983

Sejarah sosial daerah Sumatra Utara, Kotamadya Medan, 1984