APA

Kotler P., Armstrong G., .Principles of marketing. Upper Saddle River, NJ: Prentice Hall.

Chicago

Kotler Philip, Armstrong Gary, .Principles of marketing. Upper Saddle River, NJ: Prentice Hall.

Harvard

Kotler P., Armstrong G., .Principles of marketing. Upper Saddle River, NJ: Prentice Hall.

MLA

Kotler Philip, Armstrong Gary, .Upper Saddle River, NJ: Prentice Hall. .