Gaya APA

Swanson, C, P. et al (1965). Understanding the new elementary school mathematics a paret-theacher ì guide . California: California: Dickenson; 1965.

Gaya MLA

Swanson, Carl, P.. et al. "Understanding the new elementary school mathematics a paret-theacher ì guide". California: California: Dickenson; 1965, 1965. Text.