APA Style
Walker,Duard,L, . et al (1958).
Symposium on latency and masking in viral and Rickettsial Infection .
Minnesota:
Burgess Pub.
MLA Style
Walker,Duard,L, . et al.
"Symposium on latency and masking in viral and Rickettsial Infection".
Minnesota:
Burgess Pub,
1958.
Text.