APA (7th ed.) Citation

Machray, R. Grace O'Malley, Princess and Pirate.

Chicago Style (17th ed.) Citation

Machray, Robert. Grace O'Malley, Princess and Pirate.

MLA (9th ed.) Citation

Machray, Robert. Grace O'Malley, Princess and Pirate.

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