APA
Mark V. H., Mark J. P., . (1989). Brain power : a neurosurgeon's complete program to maintain and enhance brain fitness throughout your life. Boston, Mass: .
Chicago
Mark Vernon H, Mark Jeffrey Paul, . 1989. Brain power : a neurosurgeon's complete program to maintain and enhance brain fitness throughout your life. Boston, Mass: .
Harvard
Mark V. H., Mark J. P., . (1989). Brain power : a neurosurgeon's complete program to maintain and enhance brain fitness throughout your life. Boston, Mass: .
MLA
Mark Vernon H, Mark Jeffrey Paul, . Brain power : a neurosurgeon's complete program to maintain and enhance brain fitness throughout your life. Boston, Mass: . 1989.