MLA

Ferguson, Howard. Keyboard Duets From the 16th to the 20th Century for One and Two Pianos: An Introduction. United States: Oxford University Press, 1995.

APA

Ferguson, H. (1995). Keyboard Duets from the 16th to the 20th Century for One and Two Pianos: An Introduction. United States: Oxford University Press.

Chicago

Ferguson, Howard Keyboard Duets From the 16th to the 20th Century for One and Two Pianos: An Introduction. United States: Oxford University Press, 1995.