R. Giacconi và R. Ruffini, eds. and co-authors "Physics and Astrophysics of Neutron Stars and Black Holes", LXXV E. Fermi Summer School, SIF and North Holland (1978), also translated into Russian.
R. Gursky and R. Ruffini eds. and co-authors, "Neutron Stars, Black Holes and Binary X Ray Sources", H. Reidel (1975).
H. Ohanian and R. Ruffini "Gravitation and Spacetime", W.W. Norton, N.Y. (1994) also Translated into Italian (Zanichelli, Bologna, 1997) and Korean (Shin Won, Seoul, 2001).
R. Gursky-R. Ruffini Neutron Stars, Black Holes and Binary X Ray Sources, H. Reidel (1975)
Bardeen-Carter-Gursky-Hawking-Novikov-Thorne-Ruffini Black holes, Ed. de Witt, Gordon and Breach, New York, 1973
M. Rees-J.A. Wheeler-R. Ruffini Black Holes, Gravitational Waves and Cosmology, Gordon and Breach N.Y. 1974
