APA-ийн эшлэл(7 дахь хэвлэлт)

Wrigley, N., & Clark, G. (1997). Exit, the firm and sunk costs: Re-conceptualising the corporate geography of disinvestment and plant closure. Sage Publications.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Wrigley, N., ба G. Clark. Exit, the Firm and Sunk Costs: Re-conceptualising the Corporate Geography of Disinvestment and Plant Closure. Sage Publications, 1997.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Wrigley, N., ба G. Clark. Exit, the Firm and Sunk Costs: Re-conceptualising the Corporate Geography of Disinvestment and Plant Closure. Sage Publications, 1997.