APA (7th ed.) Citation

Pratt, O. (1990). Key to the universe, or a new theory of its mechanism: Founded upon a 1. continous orbital propulsion, arising from the velocity of gravity and its consequent aberrations, 2. resisting ethereal medium of variable density with mathematical demonstrations and tables (Nachdr. d. Ausg. 1879.). Eborn.

Chicago Style (17th ed.) Citation

Pratt, Orson. Key to the Universe, or a New Theory of Its Mechanism: Founded upon a 1. Continous Orbital Propulsion, Arising from the Velocity of Gravity and Its Consequent Aberrations, 2. Resisting Ethereal Medium of Variable Density with Mathematical Demonstrations and Tables. Nachdr. d. Ausg. 1879. Salt Lake City, Utah: Eborn, 1990.

MLA (9th ed.) Citation

Pratt, Orson. Key to the Universe, or a New Theory of Its Mechanism: Founded upon a 1. Continous Orbital Propulsion, Arising from the Velocity of Gravity and Its Consequent Aberrations, 2. Resisting Ethereal Medium of Variable Density with Mathematical Demonstrations and Tables. Nachdr. d. Ausg. 1879. Eborn, 1990.