Petroleum Refining and Petrochemistry Four-Language Dictionary/ edited by Walter Leipnitz
Gulf Publishing Company, 1976
 Buku Teks
Legge, James
The Four Books
[publisher not identified], [date of publication not identified]
 Buku Referensi
Legge, James
The four Books
[publisher not identified], [date of publication not identified]
 Buku Referensi
Imron Rosadi
Analisis implementasi strategi PT Bank Negara Indonesia (Persero), Tbk dengan menggunakan konsep Four Levers of Control studi kasus pada PT Bank Negara Indonesia (Persero), Tbk = Analysis strategic implementation PT Bank Negara Indonesia (Persero) Tbk with Four Levers of Control concept study case at PT Bank Negara Indonesia (Persero), Tbk / Imron Rosadi
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
 UI - Tesis (Membership)
Words in time : new essays on Eliot's four quartets / edited, Edward Lobb
The Athlone Press, 1993
 Buku Teks