APA (7th ed.) Citation

Gibbon, E., Prothero, B. R. E., & Holroyd, H. N. (2013). Private letters of Edward Gibbon (1753-1794) Volume 2 (of 2). Project Gutenberg.

Chicago Style (17th ed.) Citation

Gibbon, Edward, Baron Rowland Edmund Prothero, and Henry North Holroyd. Private Letters of Edward Gibbon (1753-1794) Volume 2 (of 2). Project Gutenberg, 2013.

MLA (9th ed.) Citation

Gibbon, Edward, et al. Private Letters of Edward Gibbon (1753-1794) Volume 2 (of 2). Project Gutenberg, 2013.

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