Converting Ofer Zeitouni's comment to an answer:
Billingsley, Patrick. Convergence of Probability Measures.
Ethier, Stewart and Kurtz, Thomas. Markov Processes: Characterization and Convergence.
Converting Ofer Zeitouni's comment to an answer:
Billingsley, Patrick. Convergence of Probability Measures.
Ethier, Stewart and Kurtz, Thomas. Markov Processes: Characterization and Convergence.