HELLER ROBERT. (1990). DECISION MAKERS: THE PEOPLE AND MEHTODS OF GREAT ACHIEVEMENT. CORONET BOOK.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHELLER ROBERT. DECISION MAKERS: THE PEOPLE AND MEHTODS OF GREAT ACHIEVEMENT. LONDON: CORONET BOOK, 1990.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHELLER ROBERT. DECISION MAKERS: THE PEOPLE AND MEHTODS OF GREAT ACHIEVEMENT. CORONET BOOK, 1990.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.