6-Number,
If your source has come from something that is a numbered series such as an encyclopedia, a multi-volume work or a journal with volume and/or issue numbers, then add to the citation
(ex: vol. 2, no. 9,)
(ex: vol. 10,)
(ex. disk 1, track 5,)
(ex. season 4, episode 12,)
for example:
"I, Mudd." Star Trek, created by Marc Daniels and Stephen Kandel, season 2,
episode 8, NBC, 1967.
Safir, Shan. "Learning to Listen." Educational Leadership, vol. 74, no.
8, http://www.ascd.org/publications/educational-
leadership/may17/vol74/num08/Learning-to-Listen.aspx. Accessed 10 May
2017.
(ex: vol. 2, no. 9,)
(ex: vol. 10,)
(ex. disk 1, track 5,)
(ex. season 4, episode 12,)
for example:
"I, Mudd." Star Trek, created by Marc Daniels and Stephen Kandel, season 2,
episode 8, NBC, 1967.
Safir, Shan. "Learning to Listen." Educational Leadership, vol. 74, no.
8, http://www.ascd.org/publications/educational-
leadership/may17/vol74/num08/Learning-to-Listen.aspx. Accessed 10 May
2017.