Bergen, S. A. (1990). R&D management: Managing projects and new products (New rev. ed.). B. Blackwell.

Bergen, S. A. R&D Management: Managing Projects and New Products. New rev. ed. Oxford, UK ; Cambridge, Mass., USA: B. Blackwell, 1990.

Bergen, S. A. R&D Management: Managing Projects and New Products. New rev. ed. B. Blackwell, 1990.