APA (7th ed.) Citation

London Philharmonic Orchestra, Sills, B., & Rudel, J. (1971). Welcome to Vienna. Audio Treasury.

Chicago Style (17th ed.) Citation

London Philharmonic Orchestra, Beverly Sills, and Julius Rudel. Welcome to Vienna. Los Angeles, Calif: Audio Treasury, 1971.

MLA (9th ed.) Citation

London Philharmonic Orchestra, et al. Welcome to Vienna. Audio Treasury, 1971.