Gaya APA

Watkins, M, D. (2013). The First 90 Days : Proven Strategies for getting Up to Speed Faster and Smarter ( Updated and Expanded Ed.) (edisi diperluas). : Harvard Business Review Press.

Gaya MLA

Watkins, Michael, D.. "The First 90 Days : Proven Strategies for getting Up to Speed Faster and Smarter ( Updated and Expanded Ed.)". edisi diperluas : Harvard Business Review Press, 2013. Text.