Steves, R., Green, B., Kotz, S., Leutzinger, R., & Openshaw, G. (2025). Rick Steves' Portugal 2025 (Thirteenth edition.). Avalon Travel.
Cita Chicago Style (17a ed.)Steves, Rick, Ben Green, Suzanne Kotz, Rosie Leutzinger, y Gene Openshaw. Rick Steves' Portugal 2025. Thirteenth edition. Berkeley, Calif.: Avalon Travel, 2025.
Cita MLA (8a ed.)Steves, Rick, et al. Rick Steves' Portugal 2025. Thirteenth edition. Avalon Travel, 2025.
Precaución: Estas citas no son 100% exactas.