Gaya APA

Mortl, . et al (1976). Developments in sendimentology 20: Stromatolites (1976). : New York : Elsevier scientific Pub.Co.,.

Gaya MLA

Mortl, . et al. "Developments in sendimentology 20: Stromatolites". 1976 : New York : Elsevier scientific Pub.Co.,, 1976. Text.