APA (7th ed.) Citation

Stratemeyer, E., & Boehm, H. R. (2011). Dave Porter on Cave Island; Or, A Schoolboy's Mysterious Mission. Project Gutenberg.

Chicago Style (17th ed.) Citation

Stratemeyer, Edward, and H. Richard Boehm. Dave Porter on Cave Island; Or, A Schoolboy's Mysterious Mission. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Stratemeyer, Edward, and H. Richard Boehm. Dave Porter on Cave Island; Or, A Schoolboy's Mysterious Mission. Project Gutenberg, 2011.

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