APA (7th ed.) Citation

Doyle, A. C. S., & Doyle, A. C. S. El mundo perdido.

Chicago Style (17th ed.) Citation

Doyle, Arthur Conan Sir, and Arthur Conan Sir Doyle. El Mundo Perdido.

MLA (9th ed.) Citation

Doyle, Arthur Conan Sir, and Arthur Conan Sir Doyle. El Mundo Perdido.

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