APA (7 ম সংস্করণ) উদ্ধৃতি

SCHULLER ROBERT H. (1991). BE HAPPY ATTITUDES: 8 POSITIVE ATTITUDES THAT CAN TRANSFORM YOUR LIFE. BANTAM BOOKS.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

SCHULLER ROBERT H. BE HAPPY ATTITUDES: 8 POSITIVE ATTITUDES THAT CAN TRANSFORM YOUR LIFE. NEW YORK: BANTAM BOOKS, 1991.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

SCHULLER ROBERT H. BE HAPPY ATTITUDES: 8 POSITIVE ATTITUDES THAT CAN TRANSFORM YOUR LIFE. BANTAM BOOKS, 1991.