APA استشهاد

Knut Sydsaeter. (2014). Essential mathematics for economic analysis (4.). Dorling kindersley.

استشهاد بنمط شيكاغو

Knut Sydsaeter. Essential Mathematics for Economic Analysis. 4. New Delhi: Dorling kindersley, 2014.

MLA استشهاد

Knut Sydsaeter. Essential Mathematics for Economic Analysis. 4. Dorling kindersley, 2014.