توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

TRACY BRIAN. (2007). EAT THAT FROG: 21 GREAT WAYS TO STOP PROCRASTINATING AND GET MORE DONE IN LESS TIME. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

TRACY BRIAN. EAT THAT FROG: 21 GREAT WAYS TO STOP PROCRASTINATING AND GET MORE DONE IN LESS TIME. NEW DELHI: TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2007.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

TRACY BRIAN. EAT THAT FROG: 21 GREAT WAYS TO STOP PROCRASTINATING AND GET MORE DONE IN LESS TIME. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2007.