Cita APA (7th ed.)

Ettema, R., & Mutel, C. F. (2014). Hans Albert Einstein: His life as a pioneering engineer. American Society of Civil Engineers.

Cita Chicago (17th ed.)

Ettema, R., i Cornelia Fleischer Mutel. Hans Albert Einstein: His Life as a Pioneering Engineer. Reston, Virginia: American Society of Civil Engineers, 2014.

Cita MLA (9th ed.)

Ettema, R., i Cornelia Fleischer Mutel. Hans Albert Einstein: His Life as a Pioneering Engineer. American Society of Civil Engineers, 2014.