APA (7th ed.) Citation

MacLean, A. (2020). The last frontier. HarperCollins Publishers.

Chicago Style (17th ed.) Citation

MacLean, Alistair. The Last Frontier. London, England: HarperCollins Publishers, 2020.

MLA (9th ed.) Citation

MacLean, Alistair. The Last Frontier. HarperCollins Publishers, 2020.

Warning: These citations may not always be 100% accurate.