APA-viite

Perrin, R. (1971). Focus the future: An introduction to long range corporate planning. Management.

Chicago-tyylinen lähdeviittaus

Perrin, Robert. Focus the Future: An Introduction to Long Range Corporate Planning. London: Management, 1971.

MLA-viite

Perrin, Robert. Focus the Future: An Introduction to Long Range Corporate Planning. Management, 1971.