APA (7th ed.) Citation

Nickels, S., Kallas, H., & Friedman, P. (1973). Finland: An introduction. Allen & Unwin.

Chicago Style (17th ed.) Citation

Nickels, Sylvie, Hillar Kallas, and Philippa Friedman. Finland: An Introduction. London: Allen & Unwin, 1973.

MLA (9th ed.) Citation

Nickels, Sylvie, et al. Finland: An Introduction. Allen & Unwin, 1973.