APA (7th ed.) Citation
Thatcher, M. (1993). The downing street years. Harper Collins publishers.
Chicago Style (17th ed.) Citation
Thatcher, Margaret. The Downing Street Years. New York: Harper Collins publishers, 1993.
MLA (9th ed.) Citation
Thatcher, Margaret. The Downing Street Years. Harper Collins publishers, 1993.
Warning: These citations may not always be 100% accurate.