APA
Guinto R. S., . (2021). Impact of Covid-19 pandemic in customs clearance process. [Place of publication not identified]: [Publisher not identified].
Chicago
Guinto Rona S, . 2021. Impact of Covid-19 pandemic in customs clearance process. [Place of publication not identified]: [Publisher not identified].
Harvard
Guinto R. S., . (2021). Impact of Covid-19 pandemic in customs clearance process. [Place of publication not identified]: [Publisher not identified].
MLA
Guinto Rona S, . Impact of Covid-19 pandemic in customs clearance process. [Place of publication not identified]: [Publisher not identified]. 2021.