There are two ways to determine the source of your BookNow reservations. This article shows where your BookNow bookings came from.
By looking the reservation
When looking at the booking itself, the Source will list the source of the booking:

There are two ways to determine the source of your BookNow reservations. This article shows where your BookNow bookings came from.
When looking at the booking itself, the Source will list the source of the booking: