# Creating relationships

There are numerous ways to create relationships in MARC and within Sierra, current preferred options are:

### [544](https://docs.wellcomecollection.org/library-cataloguing/9yMHsFGBXS9DDRGtdmSE/bibliographic-record/5xx#id-544-location-of-other-archival-materials-note-r)

### [773](https://docs.wellcomecollection.org/library-cataloguing/9yMHsFGBXS9DDRGtdmSE/bibliographic-record/7xx#id-773-host-item-entry-r)

### [774](https://docs.wellcomecollection.org/library-cataloguing/9yMHsFGBXS9DDRGtdmSE/bibliographic-record/7xx#id-774-constituent-item-entry-r)

### [787](https://docs.wellcomecollection.org/library-cataloguing/9yMHsFGBXS9DDRGtdmSE/broken-reference)

### [856](https://docs.wellcomecollection.org/library-cataloguing/9yMHsFGBXS9DDRGtdmSE/bibliographic-record/7xx#id-787-other-relationship-entry-r) Historic