Which is the correct way to reference the following:

Author: MIHO NAGASAWA

Quote: Compared with other domesticated animals, dogs have developed a special relationship with humans, and can be considered as the only species to have established a niche for themselves in human society.

Page number: 1

a

Nagasawa states, "Compared with other domesticated animals, dogs have developed a special relationship with humans, and can be considered as the only species to have established a niche for themselves in human society.'"
b

"Compared with other domesticated animals, dogs have developed a special relationship with humans, and can be considered as the only species to have established a niche for themselves in human society."
c

Nagasawa states, "Compared with other domesticated animals, dogs have developed a special relationship with humans, and can be considered as the only species to have established a niche for themselves in human society" (1).