APA

Hutchins R. M. E., .The great ideas today 1981. Chicago, Il: Encyclopaedia Britanica, Inc.

Chicago

Hutchins Robert Maynard Ed, .The great ideas today 1981. Chicago, Il: Encyclopaedia Britanica, Inc.

Harvard

Hutchins R. M. E., .The great ideas today 1981. Chicago, Il: Encyclopaedia Britanica, Inc.

MLA

Hutchins Robert Maynard Ed, .Chicago, Il: Encyclopaedia Britanica, Inc. .