APA aipamena

Barber, J., Metcalfe, J. S., & Porteous, M. (1989). Barriers to growth in small firms. Routledge.

Chicago Style aipamena

Barber, J., J. S. Metcalfe, and M. Porteous. Barriers to Growth in Small Firms. London: Routledge, 1989.

MLA aipamena

Barber, J., et al. Barriers to Growth in Small Firms. Routledge, 1989.