APA (7th ed.) Citation

Steves, R. (2023). Rick Steves Portugal (12th edition.). Avalon Travel, Hachette Book Group.

Chicago Style (17th ed.) Citation

Steves, Rick. Rick Steves Portugal. 12th edition. Berkeley, CA: Avalon Travel, Hachette Book Group, 2023.

MLA (8th ed.) Citation

Steves, Rick. Rick Steves Portugal. 12th edition. Avalon Travel, Hachette Book Group, 2023.

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