Mayhew, D. R. (2017). " The Electoral Incentive". In Parties and Policies. New Haven (CT): Yale University Press. doi: https://doi.org/10.12987/9780300151763-002
Mayhew, David R. " The Electoral Incentive". Parties and Policies. New Haven (CT): Yale University Press, 2017. https://doi.org/10.12987/9780300151763-002 Web.
Mayhew, David R. " The Electoral Incentive". In Parties and Policies, (New Haven (CT): Yale University Press, 2017) doi: https://doi.org/10.12987/9780300151763-002
Mayhew, D. R. (2017). The Electoral Incentive. In Parties and Policies, New Haven (CT): Yale University Press. Available From: Yale University Press https://doi.org/10.12987/9780300151763-002 [Accessed 25 January 2021]