Gaya APA

R.B.Singh, . (2009). Introduction to Modern Physics [UNIT IV. ATOMIC SPECTRA] (Volume 1). New Delhi: New Age International (P) Ltd., Publishers.

Gaya MLA

R.B.Singh, . "Introduction to Modern Physics [UNIT IV. ATOMIC SPECTRA]". Volume 1 New Delhi: New Age International (P) Ltd., Publishers, 2009. e-book.