APA-viite (7. p.)
Poisson, E. A Relativist's Toolkit: The Mathematics of Black-Hole Mechanics. Cambridge University.
Chicago-viite (17. p.)
Poisson, Eric. A Relativist's Toolkit: The Mathematics of Black-Hole Mechanics. Cambridge, Inglaterra: Cambridge University.
MLA-viite (9. p.)
Poisson, Eric. A Relativist's Toolkit: The Mathematics of Black-Hole Mechanics. Cambridge University.
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