American democracy : in world perspective
by William Ebenstein [and others]
Harper & Row, Publishers, 1970
 Buku Teks SO
Schwartz, Urs
American strategy: a new perspective
Doubleday, 1966
 Buku Teks
Arindy
Strategi Pengembangan Layanan Dompet Digital dengan Perspektif Preferensi Multigenerasi = Development Strategy for Digital Wallet Services Based on The Multigenerational Preference Perspective.
Fakultas Teknik Universitas Indonesia, 2020
 UI - Tesis Membership
Perspective in American Indian culture change
edited Edward H. Spicer
University of Chicago Press, 1961
 Buku Teks SO
Latin American politics and development
edited by Howard J. Wiarda, Harvey F. Kline
Westview Press, 2007
 Buku Teks SO