APA (7th ed.) Citation

Ettinger, K. E. Libros, registros e informes.

Chicago Style (17th ed.) Citation

Ettinger, Karl E. Libros, Registros E Informes.

MLA (8th ed.) Citation

Ettinger, Karl E. Libros, Registros E Informes.

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