Marden, Orison Swett, 1848-1924 ; Sharma, B. R. (Bhagat Ram), 1947- (1931) Zindagī : Orison Swett Marden kī angrezī kitāb "The secret of achievement" kā Urdū tarjumah. Munshī Gulāb Singh Ainḍ Sanz. ISBN: .