Gaya APA

Swanson, C, P. (NULL). The New Encyclopaedia britannica volume 1 knowledge in depth alto ì arithmetic . Chicago:: Chicago: Encyclopaedia Britannica Inc.; 1983.

Gaya MLA

Swanson, Carl, P.. "The New Encyclopaedia britannica volume 1 knowledge in depth alto ì arithmetic". Chicago:: Chicago: Encyclopaedia Britannica Inc.; 1983, NULL. Text.