12328 Paul-Andre' Meyer: Quantum probability for probabilists.
SLN Math. 1538 (1993).

K. Parthasarathy: An introduction to quantum stochastic calculus.
Birkha''user 1992, 290p. 3-7643-2697-2. DM 138.
Rather difficult, but important.

11906 Saul Youssef: Quantum mechanics as complex probability theory.
Los Alamos Preprint hep-th/9307019 v.2 (1994).