Roberts, R. (2007). Learn-O-Grams: Pictorial puzzles to warm up, wind down, and energize learning. San Francisco: Wiley.
استشهاد بنمط شيكاغوRoberts, Ron. Learn-O-Grams: Pictorial Puzzles to Warm Up, Wind Down, and Energize Learning. San Francisco: Wiley, 2007.
MLA استشهادRoberts, Ron. Learn-O-Grams: Pictorial Puzzles to Warm Up, Wind Down, and Energize Learning. San Francisco: Wiley, 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.